CN103941070A - Current Measuring Device And Method For Operating The Same - Google Patents
Current Measuring Device And Method For Operating The Same Download PDFInfo
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- CN103941070A CN103941070A CN201410022636.6A CN201410022636A CN103941070A CN 103941070 A CN103941070 A CN 103941070A CN 201410022636 A CN201410022636 A CN 201410022636A CN 103941070 A CN103941070 A CN 103941070A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
- G01R15/185—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core with compensation or feedback windings or interacting coils, e.g. 0-flux sensors
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Abstract
The invention relates to a current measuring device and a method for operating the same. The current measuring device (1) comprises the components of: a backing-off current transducer (2) having at least one compensation winding (L2); a voltage generating device (R1) which is used for generating a first voltage (U1) that at least approximately corresponds with the strength of a compensation current (IK) that flows over at least one compensation winding (L2); and a compensation current reducing device (7) which is used for comparing the first voltage (U1) with a reference voltage (Uref), wherein if the first voltage (U1) exceeds the reference voltage (Uref), the compensation current reducing device functions on a power unit (6) for reducing the strength of the compensation current (IK). The invention provides the current measuring device (1) with a compensation converter (2), and a method for operating the current measuring device with the compensation converter (2). The current measuring device and the method can realize reliable operation of a power semiconductor module (9) particularly.
Description
Technical field
The present invention relates to a kind of current measuring device.In addition, the invention still further relates to a kind of method for running current measurement mechanism.
Background technology
In by the known power semiconductor modular of prior art, conventionally on substrate, be furnished with power semiconductor structure element, as for example power semiconductor switch and diode, and by means of conductor layer and bonding wire and/or the laminated film connection each other in an electrically conductive of substrate.At this, power semiconductor switch is conventionally with transistorized form, for example, as IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) or MOSFET(Metal Oxide Semiconductor Field Effect Transistor, mos field effect transistor) or the form of thyristor exist.
At this, be arranged in power semiconductor structure element on substrate conventionally and single or multiple so-called half-bridges are electrically connected, these half-bridges are for example for carrying out rectification and inversion to voltage and current.Substrate is connected with cooling body conventionally directly or indirectly.
At this, particularly in power semiconductor modular, in order to measure electric current using compensation current transformer.Common compensated current transformer has core, at least one measurement winding around core, at least one compensation winding around core, regulating device that can magnetic conduction and is driven the power cell of control by regulating device technically.In the time that the electric current that will measure flows through at least one measurement winding, at least one is measured winding and produces the measurement magnetic current that extends through core.Alternative as to this, following compensated current transformer is also known, and wherein, at least one is measured winding and measures magnetic current to produce to have replaced application, and core that can magnetic conduction is arranged in around electric line, and the electric current that measure flows through the core that this can magnetic conduction.Power cell has produced the offset current that flows through at least one compensation winding, wherein, regulating device is driven control power cell as follows,, the compensation magnetic current that extends through core being produced by least one compensation winding in the time that offset current flows through is just in time equally large with measurement magnetic current, but extends through in the opposite direction core.The in the situation that in application, at least one measuring winding, offset current Ik measures recently determining of the number of turn of winding and the number of turn of at least one compensation winding with the ratio of measuring electric current I m by least one.The measuring resistance flowing through by offset current, has produced measuring voltage proportional to offset current as output parameter.
Power semiconductor modular has driver, and in order to drive control power semiconductor switch, this driver is for example converted into the connection signal being produced by control device and cut-off signal and drives accordingly control signal for power semiconductor switch.At this, each driver is electrically connected with the control port (base stage, gate pole) of attached troops to a unit power semiconductor switch at outgoing side.
In addition, power semiconductor modular respectively has power supply conventionally, is used to driver and compensated current transformer to supply with the energy, the driver that this power supply is each power semiconductor modular and compensated current transformer power supply.
When the electric current that will be measured by compensated current transformer is for example due to mistake, while becoming large especially as for example short circuit, it is large especially that offset current also becomes, and this may cause the power cell of breaking-up or allowance for damage current transformer and/or cause power supply overload.Particularly the mistake of power supply is loaded in this and may and then causes king-sized injury, this is because may cause driver to shut down in the time that power supply transships, thereby make power semiconductor modular no longer can drive control, the rectifier and the inverter that therefore for example build by power semiconductor modular no longer can be monitored.
What be worth expectation at this is, when the electric current that will be measured by compensated current transformer is for example due to mistake, for example short circuit of picture becomes large especially, and while facing the breaking-up of the power cell to compensated current transformer or damage and/or power supply overload, offset current is not for example disconnected by safety circuit, so this is to send mistakenly the strength of current with 0 value because be configured to the control device of power ratio control semiconductor module, but the strength of current of being measured by compensated current transformer or offset current have very large value as beforely, but this value can not be to make its breaking-up that causes compensation power unit or damage or cause power supply overload so large, thereby make control device can take counter-measure.
Summary of the invention
Task of the present invention is to provide a kind of current measuring device with compensated current transformer, and a kind of for moving the method with the current measuring device of compensated current transformer, and they can realize the especially reliable operation of power semiconductor modular.
This task solves by a kind of current measuring device, and it has:
-compensated current transformer, it has core, at least one compensation winding around core, regulating device that can magnetic conduction and is driven the power cell of control by regulating device, wherein, the electric current of measuring causes extending through the measurement magnetic current of core, wherein, power cell produces the offset current that flows through at least one compensation winding, wherein, regulating device is driven control power cell as follows,, the compensation magnetic current that extends through core being produced by least one compensation winding in the time that offset current flows through is just in time equally large with measurement magnetic current, but extends through in the opposite direction core
-device for generating voltage, it is configured to produce and the intensity of offset current corresponding the first voltage at least approx, and
-offset current reduces device, and it is configured to the first voltage and reference voltage to make comparisons, and if the first voltage exceedes reference voltage, is so just applied on power cell as follows, that is, the intensity of offset current is reduced.
In addition, this task solves by a kind of method for running current measurement mechanism,
-wherein, current measuring device has compensated current transformer, and this compensated current transformer has core, compensation winding, regulating device that at least one is wound around around core that can magnetic conduction and is driven the power cell of control by regulating device,
-wherein, the electric current that measure causes extending through the measurement magnetic current of core,
-wherein, power cell produces the offset current that flows through at least one compensation winding,
-wherein, regulating device is driven control power cell as follows, that is and, the compensation magnetic current that extends through core being produced by least one compensation winding in the time that offset current flows through is just in time equally large with measurement magnetic current, but extends through in the opposite direction core,
-wherein, produce and the intensity of offset current corresponding the first voltage at least approx,
-wherein, the first voltage and reference voltage are made comparisons, and if the first voltage exceedes reference voltage, reduce with regard to the intensity that makes offset current so.
Favorable structure scheme of the present invention draws in the dependent claims.
The favorable structure scheme of this method and the favorable structure scheme of current measuring device draw similarly, and vice versa.
Prove advantageously, offset current reduces device and is configured to the first voltage and reference voltage to make comparisons, and if the first voltage exceedes reference voltage, so just be applied on power cell as follows,, the intensity of offset current being reduced to is worth the first voltage and reference voltage accordingly.Thus, can adjust the maximum intensity of offset current.
In addition, proved advantageously, power cell has the semiconductor switch being electrically connected with H electric bridge, and wherein, at least one compensation winding is arranged in the transverse legs of H electric bridge in electric mode, so this is because can realize especially simply power cell.
In addition, proved advantageously, the semiconductor switch being electrically connected with H electric bridge of power cell drives control by regulating device in the mode of width modulation, so this is because realized the energy-conservation especially operation of current measuring device.
In addition, proved advantageously, device for generating voltage is configured to resistance, and offset current flows through this resistance at least approx, and this is because this provides the simple and reliable especially structural scheme of device for generating voltage.
Associatedly proved advantageously, capacitor is in parallel with resistance electricity, and this is because the waviness of the first voltage producing by resistance is thus reduced.
In addition, prove advantageously, offset current reduces device and has differential amplifier and adjustment link, wherein, differential amplifier, for the first voltage and reference voltage are made comparisons, and if the first voltage exceedes reference voltage, so just acts on adjustment link as follows,, adjustment link reduces the control voltage that is arranged in the control voltage of the semiconductor switch in the upper branch of H electric bridge and/or is arranged in the semiconductor switch in the lower leg of H electric bridge in electric mode in electric mode.Thus, provide the offset current building in simple especially mode to reduce device.
In addition, proved advantageously, the first voltage and reference voltage have been made comparisons, and if the first voltage exceedes reference voltage, with regard to the intensity of offset current is reduced to, the first voltage and reference voltage have been worth accordingly so.Thus, can adjust the maximum intensity of offset current.
In addition, prove advantageously, power semiconductor modular has substrate, is furnished with power semiconductor switch, wherein on this substrate, power semiconductor modular has driver and according to current measuring device of the present invention, this driver is used for driving control power semiconductor switch, and wherein, power semiconductor modular has electric supply installation, this electric supply installation is used to driver and current measuring device power supply, and this is because this power semiconductor modular has extra high reliability.
Brief description of the drawings
Embodiments of the invention shown in the drawings are also described in greater detail hereinafter.This:
Fig. 1 illustrates the schematic circuit according to current measuring device of the present invention;
Fig. 2 illustrates power supply;
Fig. 3 illustrates the schematic perspective view of power semiconductor modular; And
Fig. 4 illustrates the schematic cross sectional views of power semiconductor modular.
Embodiment
Shown in Figure 1 according to the schematic circuit of current measuring device 1 of the present invention.Electric supply installation 8 shown in Figure 2, it powers to current measuring device 1, and for this reason by two voltage sources that produce respectively voltage U v produce two supply voltage Uv with reference to the earth and-Uv.In an embodiment, supply voltage Uv=15V and supply voltage-Uv=-15V.Power supply 8 conducts electricity and is connected on the interface shown in Fig. 1 with current measuring device 1 according to the present invention.
In the framework of embodiment, current measuring device 1 according to the present invention has compensated current transformer 2, this compensated current transformer have can magnetic conduction core 3, around the measurement winding L 1 of core 3, compensation winding L 2, regulating device 5 around core 3 and driven the power cell 6 of control by regulating device 5.Core 3 for example can be configured with the form of the core of ferroalloy plate, or is configured to ferrite core.In the time that the electric current I m that will measure flows through measurement winding L 1, measure winding L 1 and produce the measurement magnetic current that extends through core 3.
Alternative as to this, compensated current transformer 2 also can be constructed as follows,, replace at least one measurement winding for generation of measurement magnetic current of application, core 3 that can magnetic conduction is arranged in around electric line, and the electric current I m that measure flows through the core that this can magnetic conduction, and this is shown in broken lines in Fig. 1.
In two embodiments of compensated current transformer 2, the electric current I m that measure has caused extending through the measurement magnetic current of core 3.
Power cell 6 produces the offset current Ik that flows through compensation winding L 2, wherein, regulating device 5 is driven control power cell 6 as follows,, in the time that flowing through, offset current Ik by compensating the compensation magnetic current that extends through core 3 that winding L 2 produces just in time with to measure magnetic current equally large, but extends through in the opposite direction core 3.The total magnetic current Ф that extends through core 3 is measured by sensor 4, and is adjusted on numerical value 0 by control and compensation electric current I k by regulating device 5 and power cell 6.Sensor 4 can exist with the form of the form of Hall element or weak magnetic sensor.Offset current Ik with the ratio of measuring electric current I m by measuring recently determining of the number of turn of winding L 1 and the number of turn of compensation winding L 2.The measuring resistance Rm flowing through by offset current Ik, has produced measuring voltage Um proportional to offset current Ik as for example for power ratio control semiconductor module output parameter.Be noted that in the framework at embodiment at this, compensated current transformer 2 only has a single compensation winding L 2, but compensated current transformer 2 also can have multiple compensation windings around core.In addition be noted that in the framework of embodiment, compensated current transformer 2 only has a single measurement winding L 1, but compensated current transformer 2 also can have multiple measurement windings around core.
In the framework of embodiment, power semiconductor modular 9 has according to current measuring device 1 of the present invention, and this current measuring device measurement is flow through load connection element 10(and seen Fig. 3) electric current as the electric current that will measure.
Power cell 6 preferably has the first transistor T1, transistor seconds T2, the 3rd transistor T 3 and the 4th transistor T 4, and wherein, transistor T 1, T2, T3 and T4 are electrically connected with H electric bridge, and compensation winding L 2 is arranged in the transverse legs of H electric bridge in electric mode.At this, transistor T 1, T2, T3 and the T4 of power cell 6 preferably drives control to produce offset current Ik in the mode of width modulation.In order to form H electric bridge, in an embodiment, the collector of the emitter of the 3rd transistor T 3 and the first transistor T1, and the collector of the emitter of the 4th transistor T 4 and transistor seconds T2, and the collector of the collector of the 3rd transistor T 3 and the 4th transistor T 4, and the emitter of the first transistor T1 is electrically connected with the emitter of transistor seconds T2.The emitter of the emitter of the 3rd transistor T 3 and the 4th transistor T 4 be electrically connected the transverse legs that forms H electric bridge, wherein, compensation winding L 2 is arranged in the transverse legs of H electric bridge in electric mode.Measuring resistance Rm connects with compensation winding L 2 electricity, and is therefore arranged in equally in the transverse legs of H electric bridge.In addition preferably, as shown in Figure 1, wherein each transistor T 1, T2, T3 and T4 connect and have fly-wheel diode with the mode electricity of anti-parallel connection.If desired, for example, in order to prevent overvoltage, transistor T 1, T2, T3 and T4 can be electrically connected with load circuit, and this is not shown in Fig. 1.
In addition, current measuring device 1 has device for generating voltage, and this device for generating voltage is configured to produce with the intensity of offset current Ik and is at least similar to corresponding and first voltage U 1 corresponding with the intensity of offset current Ik in the ideal case.In the framework of embodiment, device for generating voltage is configured to resistance, that is to say that device for generating voltage exists with the form of the first resistance R 1, wherein, and by the first resistance R 1 first voltage U 1 that declined.The electric current I k' that flows through the first resistance R 1 is at least approximate corresponding to offset current Ik and in the ideal situation corresponding to offset current Ik, thereby the first voltage U 1 is corresponding and corresponding with the intensity of offset current in the ideal case with the intensity of offset current at least approx.Due to for example in the case of applying traditional bipolar transistor for H electric bridge; very little control electric current is by the control port B(base stage of transistor T 1, T2, T3 and T4) flow to transistorized emitter; and in the situation that application of reduced pressure circuit prevents overvoltage with protective transistor and in commutation process; can cause the deviation between offset current Ik and electric current I k'; wherein, electric current I k' is at least approx corresponding to offset current Ik.In ideal conditions, electric current I k' is corresponding to offset current Ik.Offset current Ik and flow through the deviation that may exist between the electric current I k' of the first resistance R 1 and can be left in the basket in the present invention.Be noted that at this, replace the traditional bipolar transistor of application as the semiconductor switch for H electric bridge, also can apply IGBT or MOSFET as the semiconductor switch for H electric bridge, and therefore can avoid flowing to from the control port of transistor T 1, T2, T3 and T4 the control electric current of the emitter of transistor T 1, T2, T3 and T4.
In addition, current measuring device 1 has offset current and reduces device 7, and it is for the first voltage U 1 is made comparisons with la tension de reference Uref est, and if the first voltage U 1 exceedes la tension de reference Uref est, so just act on power cell 6, the intensity of offset current Ik is reduced.Therefore, can avoid damaging or damaging power cell 6 and/or avoid making power supply 8 to transship, at this preferably, the intensity of offset current Ik is reduced to the first voltage U 1 is worth accordingly with la tension de reference Uref est.Therefore, by correspondingly selecting the intensity of la tension de reference Uref est can adjust the intensity of reference current Ik maximum possible, and therefore the electric power consumption of current measuring device 1 is limited to maximal value, thereby makes power supply 8 can not transship and/or damage or damage power cell 6 very high in the situation that will measure electric current I m.
Offset current reduces device 7 and preferably has differential amplifier 23 and adjustment link 24, wherein, differential amplifier is configured to the first voltage U 1 to make comparisons with la tension de reference Uref est, and if the first voltage U 1 exceedes la tension de reference Uref est, so just be applied on adjustment link 24 as follows, , adjustment link 24 makes to be arranged in being applied to the control voltage between base stage and emitter and/or making and being arranged in transistor T 1 in the portion's branch road under H electric bridge and the control voltage being applied between base stage and emitter of T2 reduces in electric mode of transistor T 3 in the upper branch of H electric bridge and T4 in electric mode.According in the embodiment of Fig. 1, be arranged in transistor T 1 in the lower leg of H electric bridge and the control voltage of T2 in electric mode and be reduced.Be applied to if transistorized about the base stage of relevant transistorized emitter in other words the control voltage on gate pole exceeded specific value, transistor is transformed into its conducting state so, that is to say, has obvious electric current to start to flow through transistorized collector.In an embodiment, the control voltage of transistor T 1 and T2 exists with the form that is applied to respectively the voltage between base stage B and the emitter of each transistor T 1 or T2.
The the first capacitor C1 preferably existing reduces the waviness of the first voltage U 1.
In the framework of embodiment, differential amplifier 23 has the 5th transistor and the 6th transistor and the second resistance R 2 and the 3rd resistance R 3, and they are electrically connected as shown in Figure 1.The 3rd resistance R 3 defines the electric current that flows through transistor T 5 and T6.As long as the first voltage U 1 is greater than la tension de reference Uref est, the electric current that flows through so the collector of the 5th transistor T 5 reduces and flows through the electric current increase of the collector of the 6th transistor T 6, thereby the voltage in the second resistance R 2 is increased.
In the framework of embodiment, adjustment link 24 has the 7th transistor T 7, the second capacitor C2 and the first diode D1 and the second diode D2.If the voltage in the second resistance R 2 exceedes specific value, the 7th transistor T 7 is transformed in its conducting state and has electric current to flow through the collector of the 7th transistor T 7 so, the control voltage of the first and second transistor Ts 1 and T2 reduces and because the each resistance of transistor T 1 and T2 improves, therefore offset current Ik reduces thus.By this way, reduce device 7 by offset current and define offset current Ik.The first and second diode D1 and D2 make the base stage of the 7th transistor T 7 and the first and second transistor Ts 1 and T2 depart from direction of current.Capacitor C2 has improved the stability that reduces the regulating loop that device 7, the first and second transistor Ts 1 and T2 and the first resistance R 1 form by offset current.
Schematic perspective view shown in Figure 3, and the cut-open view of power semiconductor modular shown in Figure 49.Power semiconductor modular 9 has substrate 19.On substrate 19 has insulating material body 15 and is arranged in the first side of insulating material body 15 and structurized first line layer 16 of the conduction being connected with insulating material body 15, this first line layer constructs conductor tracks.Substrate 19 preferably has preferred non-structured second line layer 17 of conduction, and wherein, insulating material body 15 is arranged between structurized the first line layer 16 and the second line layer 17.Structurized first line layer 16 of substrate 2 for example can be made of copper.Substrate for example can exist with the form of DCB substrate or insulating metal substrate as in an embodiment.The in the situation that of DCB substrate, insulating material body 15 for example can be made up of pottery, and the second line layer 17 of first substrate for example can be made of copper.The in the situation that of insulating metal substrate, insulating material body 15 for example can be made up of polyimide layer or epoxy resin layer, and the second line layer 17 of substrate can be made up of metal forming body.Metal forming style is as being made up of aluminum or aluminum alloy.
Substrate 19 preferably with cooling body 18 or be connected for the plate that power semiconductor modular 9 is thermally connected on cooling body.
On substrate 19, be furnished with power semiconductor switch 14.At this, power semiconductor switch can be for example with transistorized form, as for example IGBT(insulated gate bipolar transistor: Insulated Gate Bipolar Transistor) or MOSFET(mos field effect transistor: Metal Oxide Semiconductor Field Effect Transistor) or the form of thyristor exist.Power semiconductor switch 14 is preferably connected by bonding wire 13 connection each other in an electrically conductive and with the load connection element 10,11 and 12 of conduction.
In the framework of embodiment, power semiconductor modular 9 has according to current measuring device 1 of the present invention, and this current measuring device measurement is flow through the electric current of load connection element 10 as measuring electric current I m.In an embodiment, load connection element 10 has two discrete component 10' and 10 " form; wherein; the first discrete component 10' in an embodiment with the hole for bolt guide is passed is shown in Figure 3; and the second discrete component 10 of load connection element 10 " be connected with substrate 19, this is shown in Figure 4.At two discrete component 10' and 10 of load connection element 10 " between electricity connect the measurement winding L 1 that has current measuring device 1, that is to say two discrete component 10' and 10 " be electrically connected to each other by measuring winding L 1.
Power semiconductor modular 9 has to drive the driver 22 of control power semiconductor switch 14, and this driver is for example by by being converted into and driving accordingly control signal for power semiconductor switch 14 understanding connection signal that the unimportant and not shown in figures control device of the present invention produces and cut-off signal.At this, each driver is electrically connected with the control port (base stage or grid) of attached troops to a unit power semiconductor switch at outgoing side, and wherein, for simplicity's sake, related to this being connected electrically in Fig. 4 is not shown.
In addition, power semiconductor modular 9 has electric supply installation 8(also can be referring to Fig. 2), it is configured to power for current measuring device 1, and especially according to additionally powering for driver 22 in the framework of the embodiment of Fig. 3 and Fig. 4.For simplicity's sake, being electrically connected between power supply 8 and driver 22 do not have shown in Figure 4.
Power supply 8 and driver 22 preferred arrangements are on conductor plate 14.
In addition, power semiconductor modular 9 preferably has housing 20, and this housing laterally surrounds power semiconductor switch 14.
Claims (10)
1. a current measuring device, comprising:
-compensated current transformer (2), described compensated current transformer has core (3) that can magnetic conduction, at least one is around the compensation winding (L2) of described core (3), regulating device (5) and driven the power cell (6) of control by described regulating device (5), wherein, the electric current (Im) of measuring causes extending through the measurement magnetic current of described core (3), wherein, described power cell (6) produces the offset current (Ik) that flows through described at least one compensation winding (L2), wherein, described regulating device (5) is driven the described power cell of control (6), make in the time that described offset current (Ik) flows through just in time equally large with described measurement magnetic current by the compensation magnetic current that extends through described core (3) of described at least one compensation winding (L2) generation, but extend through described core (3) with the direction contrary with described measurement magnetic current,
-device for generating voltage (R1), described device for generating voltage for generation of with the intensity of described offset current (Ik) corresponding the first voltage (U1) at least approx, and
-offset current reduces device (7), described offset current reduces device for described the first voltage (U1) and reference voltage (Uref) are made comparisons, and if described the first voltage (U1) exceedes described reference voltage (Uref), so just act on described power cell (6), the intensity of described offset current (Ik) is reduced.
2. current measuring device according to claim 1, it is characterized in that, described offset current reduces device (7) for described the first voltage (U1) and reference voltage (Uref) are made comparisons, and if described the first voltage (U1) exceedes described reference voltage (Uref), just act on described power cell (6), make the intensity of described offset current (Ik) be reduced to the value that makes described the first voltage (U1) corresponding with described reference voltage (Uref).
3. according to the current measuring device one of the claims Suo Shu, it is characterized in that, described power cell (6) has the semiconductor switch (T1, T2, T3, T4) being electrically connected with H electric bridge, wherein, described at least one compensation winding (L2) is arranged in the transverse legs of described H electric bridge in electric mode.
4. current measuring device according to claim 3, is characterized in that, the semiconductor switch being electrically connected with H electric bridge (T1, T2, T3, T4) of described power cell (6) drives control by described regulating device (5) in the mode of width modulation.
5. according to the current measuring device one of the claims Suo Shu, it is characterized in that, described device for generating voltage (R1) is configured to resistance, and described offset current (Ik) flows through described resistance at least approx.
6. current measuring device according to claim 5, is characterized in that, capacitor (C1) is in parallel with described resistance (R1) electricity.
7. according to the current measuring device one of claim 3 to 6 Suo Shu, it is characterized in that, described offset current reduces device (7) and has differential amplifier (23) and adjustment link (24), wherein, described differential amplifier (23) is for making comparisons described the first voltage (U1) and described reference voltage (Uref), and if described the first voltage (U1) exceedes described reference voltage (Uref), so just act on described adjustment link (24), make described adjustment link (24) reduce to be arranged in the semiconductor switch (T3 in the upper branch of described H electric bridge in electric mode, T4) control voltage and/or be arranged in the semiconductor switch (T1 in the lower leg of described H electric bridge in electric mode, T2) control voltage.
8. a power semiconductor modular, described power semiconductor modular has substrate (19), on described substrate, be furnished with power semiconductor switch (14), wherein, described power semiconductor modular (9) has driver (22) and according to the current measuring device one of claim 1 to 7 Suo Shu (1), described driver is used for driving the described power semiconductor switch of control (14), wherein, described power semiconductor modular (9) has electric supply installation (8), and described electric supply installation is used to described driver (22) and described current measuring device (1) power supply.
9. for the method for running current measurement mechanism,
-wherein, described current measuring device (1) has compensated current transformer (2), described compensated current transformer has core (3), compensation winding (L2), regulating device (5) that at least one is wound around around described core (3) that can magnetic conduction and is driven the power cell (6) of control by described regulating device (5)
-wherein, the electric current (Im) that measure causes extending through the measurement magnetic current of described core (3),
-wherein, described power cell (6) produces the offset current (Ik) that flows through described at least one compensation winding (L2),
-wherein, described regulating device (5) is driven the described power cell of control (6), make in the time that described offset current (Ik) flows through just in time equally large with described measurement magnetic current by the compensation magnetic current that extends through described core (3) of described at least one compensation winding (L2) generation, but extend through described core (3) with the direction contrary with described measurement magnetic current
-wherein, produce and the intensity of described offset current (Ik) corresponding the first voltage (U1) at least approx,
-wherein, described the first voltage (U1) and reference voltage (Uref) are made comparisons, and if described the first voltage (U1) exceedes described reference voltage (Uref), just reduce the intensity of described offset current (Ik).
10. method according to claim 9, it is characterized in that, described the first voltage (U1) and reference voltage (Uref) are made comparisons, and if described the first voltage (U1) exceedes described reference voltage (Uref), so just the intensity of described offset current (Ik) is reduced to the value that makes described the first voltage (U1) corresponding with described reference voltage (Uref).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013200636.5 | 2013-01-17 | ||
| DE102013200636.5A DE102013200636B4 (en) | 2013-01-17 | 2013-01-17 | Current measuring device and method for operating a current measuring device |
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| Publication Number | Publication Date |
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| CN103941070A true CN103941070A (en) | 2014-07-23 |
| CN103941070B CN103941070B (en) | 2018-08-28 |
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| CN201410022636.6A Active CN103941070B (en) | 2013-01-17 | 2014-01-17 | Current measuring device and method for running current measuring device |
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| EP (1) | EP2757382A3 (en) |
| KR (1) | KR101998434B1 (en) |
| CN (1) | CN103941070B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105334367A (en) * | 2015-11-13 | 2016-02-17 | 扬州国扬电子有限公司 | Power semiconductor module for integrating magnetic core of current sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102018122314B3 (en) * | 2018-09-12 | 2019-12-12 | Sma Solar Technology Ag | Arrangement for determining a total current in a line |
| DE102018125814A1 (en) | 2018-10-17 | 2020-04-23 | Semikron Elektronik Gmbh & Co. Kg | Arrangement for measuring a current, method and power semiconductor device |
| KR102707966B1 (en) * | 2022-10-20 | 2024-09-19 | 주식회사 현대케피코 | The trouble sensing circuit of the free wheeling diode and method for operating therof |
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| CN105334367A (en) * | 2015-11-13 | 2016-02-17 | 扬州国扬电子有限公司 | Power semiconductor module for integrating magnetic core of current sensor |
| CN105334367B (en) * | 2015-11-13 | 2018-05-25 | 扬州国扬电子有限公司 | The power semiconductor modular of integrated current sensors magnetic core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103941070B (en) | 2018-08-28 |
| KR20140093183A (en) | 2014-07-25 |
| DE102013200636B4 (en) | 2016-04-07 |
| EP2757382A2 (en) | 2014-07-23 |
| DE102013200636A1 (en) | 2014-07-17 |
| KR101998434B1 (en) | 2019-07-09 |
| IN2013MU03911A (en) | 2015-08-14 |
| EP2757382A3 (en) | 2017-12-06 |
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